A get's it's name from it's location meaning "the frontier of Hindustan"  as the Mughals saw it as a Gateway to India. It was completely razed to the ground in 1710 AD by Banda Bahadur, as a revenge against Wazir Khan's it's Governor, the man responsible for the live entombing of Guru Gobind Singh's sons. B contains the spot where the Guru's sons were entombed alive, and  after the Sikh's  razed the fort here, totally to the ground, proclaimed it as the "Town of Victory, which is also the name of the Gurudwara here. Identify A and B.